-
公开(公告)号：DE69122934D1
公开(公告)日：1996-12-05
申请号：DE69122934
申请日：1991-08-08
Applicant: TORAY INDUSTRIES
Inventor： IKEDA TOSHIHIRO , NAKAGAWA YUKIO , UEMURA TADAHIRO , KURIHARA MASARU
Abstract: A composite semipermeable membrane which has a high electrolytes rejection even when the concentration of the electrolytes in feed water is very low and even if the pH of feed water is not less than 8 is disclosed. The composite semipermeable membrane of the present invention comprises a microporous substrate and a cross-linked polyamide-based ultra-thin membrane laminated on the microporous substrate, the ultra-thin membrane having a covalently bonded quaternary nitrogen atom.
-
公开(公告)号：DE69122934T2
公开(公告)日：1997-04-03
申请号：DE69122934
申请日：1991-08-08
Applicant: TORAY INDUSTRIES
Inventor： IKEDA TOSHIHIRO , NAKAGAWA YUKIO , UEMURA TADAHIRO , KURIHARA MASARU
Abstract: A composite semipermeable membrane which has a high electrolytes rejection even when the concentration of the electrolytes in feed water is very low and even if the pH of feed water is not less than 8 is disclosed. The composite semipermeable membrane of the present invention comprises a microporous substrate and a cross-linked polyamide-based ultra-thin membrane laminated on the microporous substrate, the ultra-thin membrane having a covalently bonded quaternary nitrogen atom.
-
公开(公告)号：DE68916343D1
公开(公告)日：1994-07-28
申请号：DE68916343
申请日：1989-01-10
Applicant: TORAY INDUSTRIES
Inventor： UEMURA TADAHIRO , FUJIMAKI HIDEO , IKEDA TOSHIHIRO
Abstract: A process for producing a composite semipermeable membrane, which comprises coating a microporous support membrane with a polyamide formed by the interfacial polycondensation between a polyfunctional aromatic amine and a polyfunctional acyl halide. The polyfunctional aromatic amine component contains, as the comonomer component, 1 to 20 wt %, based on said aromatic amine, of at least one member selected from among alkyldiamine, 1,3,5-trihydroxybenzene and 1,3-dihydroxybenzene, and hence the resulting composite semipermeable membrane has markedly improved oxidation resistance while maintaining the excellent highly selective separative function and high permeability of a crosslinked polyamide type composite semipermeable membrane. This membrane can be suitably used for desalting of brine or seawater.
-
公开(公告)号：AT107538T
公开(公告)日：1994-07-15
申请号：AT89901294
申请日：1989-01-10
Applicant: TORAY INDUSTRIES
Inventor： UEMURA TADAHIRO , FUJIMAKI HIDEO , IKEDA TOSHIHIRO
Abstract: A process for producing a composite semipermeable membrane, which comprises coating a microporous support membrane with a polyamide formed by the interfacial polycondensation between a polyfunctional aromatic amine and a polyfunctional acyl halide. The polyfunctional aromatic amine component contains, as the comonomer component, 1 to 20 wt %, based on said aromatic amine, of at least one member selected from among alkyldiamine, 1,3,5-trihydroxybenzene and 1,3-dihydroxybenzene, and hence the resulting composite semipermeable membrane has markedly improved oxidation resistance while maintaining the excellent highly selective separative function and high permeability of a crosslinked polyamide type composite semipermeable membrane. This membrane can be suitably used for desalting of brine or seawater.
-
公开(公告)号：DE68916343T2
公开(公告)日：1995-01-19
申请号：DE68916343
申请日：1989-01-10
Applicant: TORAY INDUSTRIES
Inventor： UEMURA TADAHIRO , FUJIMAKI HIDEO , IKEDA TOSHIHIRO
Abstract: A process for producing a composite semipermeable membrane, which comprises coating a microporous support membrane with a polyamide formed by the interfacial polycondensation between a polyfunctional aromatic amine and a polyfunctional acyl halide. The polyfunctional aromatic amine component contains, as the comonomer component, 1 to 20 wt %, based on said aromatic amine, of at least one member selected from among alkyldiamine, 1,3,5-trihydroxybenzene and 1,3-dihydroxybenzene, and hence the resulting composite semipermeable membrane has markedly improved oxidation resistance while maintaining the excellent highly selective separative function and high permeability of a crosslinked polyamide type composite semipermeable membrane. This membrane can be suitably used for desalting of brine or seawater.
-
Patent Agency Ranking
公开(公告)号：EP0357781A4
公开(公告)日：1990-02-05
申请号：EP89901294
申请日：1989-01-10
Applicant: TORAY INDUSTRIES
Inventor： UEMURA TADAHIRO , FUJIMAKI HIDEO , IKEDA TOSHIHIRO
CPC classification number: B01D69/125
-
公开(公告)号：JP2003154362A
公开(公告)日：2003-05-27
申请号：JP2001357313
申请日：2001-11-22
Applicant: TORAY INDUSTRIES
Inventor： IKEDA KEIICHI , IKEDA TOSHIHIRO , TAKAGI RYOTA
IPC: C02F1/44 , B01D61/02 , B01D61/14 , C02F1/28 , C02F1/32 , C02F1/42 , C02F1/52 , C02F1/72 , C02F1/78 , C02F9/00
Abstract: PROBLEM TO BE SOLVED: To provide a water treatment method which increases a recovery percentage which has been about 80% at the highest in order to use water resources efficiently, enables the safe operation of an RO membrane and an NF membrane, and can correspond to measures for strengthening the regulation of a drainage standard and an apparatus for the method. SOLUTION: In the water treatment method, raw water, after being subjected to solid-liquid-separation, is separated into filtrate and concentrated water by a membrane module having the reverse osmosis membrane (RO membrane) and/or the nano-filtration membrane (NF membrane). The apparatus is operated to keep the recovery percentage at least 90%, and at least a part of the concentrated water of the membrane module is treated by a softening treatment method and/or an organic substance removing method and returned to the raw water.
-
公开(公告)号：JP2000061276A
公开(公告)日：2000-02-29
申请号：JP23823399
申请日：1999-08-25
Applicant: TORAY INDUSTRIES
Inventor： KURIHARA MASARU , FUSAOKA YOSHINARI , IKEDA TOSHIHIRO
Abstract: PROBLEM TO BE SOLVED: To impart high pressure resistance to a membrane and to suppress the change of the separation characteristics of the membrane even under a pressure of a prescribed pressure or higher and the change of the performance with time by forming a separation function layer on a two-layered support membrane consisting of a 1st layer and a 2nd layer having a larger pore diameter than that of the 1st layer and specifying the change rates of the permeation rate coefft. and solute permeation coefft. of the resultant membrane to be a prescribed value or below. SOLUTION: The composite membrane 4 comprises a porous support membrane 2 including a microporous layer 3 having ultrafiltration function or reverse osmotic separation function. The surface of the membrane 4 is coated with a separation function membrane 1 of a different material which exerts a substantial separation function. The change rates of the permeation rate coefft. and solute permeation coefft. of the composite membrane 4 are each
-
公开(公告)号：JPH10235173A
公开(公告)日：1998-09-08
申请号：JP35716597
申请日：1997-12-25
Applicant: TORAY INDUSTRIES
Inventor： MINAMIGUCHI NAOSHI , ITO AKIHIKO , FUSAOKA YOSHINARI , IKEDA TOSHIHIRO , KOJIMA SADAO
Abstract: PROBLEM TO BE SOLVED: To provide a composite semipermeable membrane enhanced in its water permeability and reduced in the lowering of org. matter excluding capacity accompanied by the enhancement of water permeability. SOLUTION: This composite semipermeable membrane is constituted by coating a microporous support film with an ultra-thin membrane layer composed of cross-linked polyamide. In this case, cross-linked polyamide is subjected to interfatial polycondensation in the presence of at least one of (i) an N- alkylamide or N,N-dialkylamide having a 3 or more C alkyl group on N as a substituent, (ii) cyclic alkylamide and N-alkyl cyclic alkylamide having a 5 or more C cyclic structure, (iii) N,N,N',N'-tetraalkylurea having a 1 or more C alkyl group on N as a substituent, (iv) alkyleneurea having 1 or 2 cyclic structures containing a 3 or more C alkylene chain and (v) hexaalkylphosphoramide having a 1 or more C alkyl group on N as a substituent.
-
公开(公告)号：JPH0952031A
公开(公告)日：1997-02-25
申请号：JP21068895
申请日：1995-08-18
Applicant: TORAY INDUSTRIES
Inventor： UETE TAKAO , IKEDA TOSHIHIRO , FUSAOKA YOSHINARI
Abstract: PROBLEM TO BE SOLVED: To improve the water penetrability of a semipermeable membrane and manufacture a membrane of high selective penetrability by providing sulfonic acid and a functional group of specified structure as a semipermeable membrane. SOLUTION: Sulfonic acid is introduced into an asymmetrical membrane or a composite semipermeable membrane provided with a reactive group such as epoxy or aziridine and manufactured preliminarily. A semipermeable membrane based on a formula thus provided (In the formula, -R represents -HO, -NH2 or the like, -R represents a hydrogen atom or a substituent or a non-substituent aliphatic group or an aromatic group, M represents hydrogen ions or metal anodic ions, (n) represents an integer of 1 or more.) is provided with high selectivity and also high water penetrability. The semipermeable membrane is composed of polyamide and a composite semipermeable membrane consisting of a separating function layer and a microporous supporting membrane. The semipermeable membrane is manufactured by reacting a compound, which reacts with sulfonic acid and a reactive group (for instance, one kind of epoxy, aziridine, episulfide, halogenated alkyl, amino and carboxylic acid) with the semipermeable membrane having the reactive group.
-
-
-
-
-
-
-
-
-
Search Results
25
records
(took 0.027 seconds)
